Home / 13,122.88-18,109.56-7,154.56

Finding the Fourth Proportional to 13,122.88, 18,109.56 and 7,154.56

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Solution

The fourth proportional to 13,122.88, 18,109.56 and 7,154.56 is: 9,873.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.88 : 18,109.56 = 7,154.56 : x
  2. Step 2: Convert to fraction form
    13,122.88/18,109.56 = 7,154.56/x
  3. Step 3: Cross multiply
    13,122.88x = 18,109.56 × 7,154.56
  4. Step 4: Simplify right side
    13,122.88x = 129,565,933.59
  5. Step 5: Solve for x
    x = 129,565,933.59/13,122.88
  6. Step 6: Final answer
    x = 9,873.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.